Automatic control SF6 equipment live gas filling device and using method

Abstract

The application belongs to the technical field of SF6 equipment air supplement, and particularly relates to an automatic control SF6 equipment live air supplement device and a use method, which comprises a shell, an air pump, a valve group, a power supply, a heating module and a display control device; the air pump, the valve group, the power supply, the heating module and the display control device are respectively arranged in the shell; the power supply is electrically connected with the air pump, the valve group, the heating module and the display control device; the display control device is electrically connected with the air pump, the valve group and the heating module; the air pump cooperates with the valve group to realize automatic vacuumization and air supplement of the SF6 equipment, manual operation of the air valve is not needed, the situation that the air supplement pressure is too large or the air supplement gas source pressure is insufficient is effectively avoided, and the operation safety is improved; meanwhile, the heating module arranged at the bottom of the pipeline effectively reduces the air moisture entering the SF6 equipment and avoids performance reduction of the SF6 equipment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of SF6 equipment gas supplement, and particularly relates to an automatic control SF6 equipment live gas supplement device and a use method. BACKGROUND

[0002] SF6 gas is filled in the SF6 electrical equipment, and the SF6 gas plays a role in arc extinguishing and insulation. The gas chamber storing the SF6 gas is connected with the atmosphere through a check valve on the equipment. When the interface seal of each part of the SF6 electrical equipment is not tight, the environmental temperature suddenly drops, or the like, the SF6 gas pressure in the electrical equipment will be reduced. The continuous reduction of the SF6 gas pressure directly affects the insulation of the electrical equipment. The SF6 gas pressure that is too low will cause the equipment to burn out. Therefore, the SF6 gas must be supplemented after the SF6 gas pressure is reduced.

[0003] At present, the supplement gas mode mostly adopts manual operation of the gas supplement valve. In the supplement gas process, the staff may be negligent, the supplement gas pressure is too large or the supplement gas source pressure is insufficient, and this is not found in time, causing the SF6 power transformer in live operation to be impacted by the airflow or to pour out gas, and causing the power accident, even the explosion danger. SUMMARY

[0004] The application aims to provide an automatic control SF6 equipment live gas supplement device and a use method, to realize the automatic vacuum extraction and gas supplement of the SF6 equipment, to improve the efficiency of the operation and maintenance work, and to guarantee the safety of the operation and maintenance work.

[0005] To achieve the above-mentioned purpose, on one hand, the application provides an automatic control SF6 equipment live gas supplement device, which comprises a shell, a gas pump, a valve group, a power supply, a heating module, and a display control device.

[0006] The gas pump, the valve group, the power supply, the heating module, and the display control device are respectively installed in the shell. The power supply is electrically connected with the gas pump, the valve group, the heating module, and the display control device. The display control device is electrically connected with the gas pump, the valve group, and the heating module.

[0007] The air pump is respectively provided with a vacuum air inlet, a vacuum air outlet, an SF6 pipe air inlet, an SF6 pipe air outlet, the vacuum air inlet, the vacuum air outlet, the SF6 pipe air inlet and the SF6 pipe air outlet are respectively connected with a valve group through pipelines, the valve group controls the vacuum air inlet, the vacuum air outlet, the SF6 pipe air inlet and the SF6 pipe air outlet respectively; the vacuum air inlet and the SF6 pipe air outlet are respectively provided with a detection module, and the detection module is electrically connected with a display control device; the vacuum air inlet and the SF6 pipe air outlet are respectively connected with an air inlet of the SF6 equipment through the valve group; the SF6 pipe air inlet is connected with an SF6 gas cylinder through the valve group; the vacuum air outlet is connected with the outside of a shell through the valve group; a pipeline connecting the SF6 pipe air outlet and the valve group is provided with a heating module.

[0008] As a further technical improvement, the detection module comprises a pressure sensor, a temperature sensor and a flow meter. The pressure sensor, the temperature sensor and the flow meter are respectively used for detecting the pressure condition, the temperature condition and the flow condition of the vacuum degree of the SF6 equipment.

[0009] As a further technical improvement, the heating module comprises an electric heating sheet and a heat shield installed outside the electric heating sheet. The electric heating sheet is heated to a specified temperature after being powered on, and the corresponding pipeline is baked; the heat shield is used to prevent high temperature from damaging the device inside.

[0010] As a further technical improvement, the display control device is arranged on the surface of the top of the shell, and the display control device comprises a processor and a touch screen, the processor is electrically connected with the touch screen, and the processor adopts a PLC controller.

[0011] As a further technical improvement, one side is provided with a pull rod, and the bottom is provided with universal wheels.

[0012] As a further technical improvement, the power supply adopts a 24V lithium battery pack, and the 24V lithium battery pack is provided with an adapted charger.

[0013] As a further technical improvement, the valve group comprises a plurality of independent electromagnetic valves.

[0014] On the other hand, the application also provides a use method of the automatic control SF6 equipment live air supplement device, comprising the following steps: S1: starting the air pump by the display control device, opening the corresponding electromagnetic valves of the vacuum air inlet and the vacuum air outlet, and closing the corresponding electromagnetic valves of the SF6 pipe air inlet and the SF6 pipe air outlet; the device sucks the internal air of the SF6 equipment, and the detection module detects whether the internal air of the SF6 equipment reaches the vacuum;

[0015] S2: When a vacuum is reached, the display and control device controls the solenoid valves of the vacuum intake port and the vacuum exhaust port to close in sequence, thereby creating negative pressure in the pipeline to expel the air from each pipeline. The display and control device then controls the heating module to open and dry the moisture in the pipeline.

[0016] S3: Keep the air pump running, open the SF6 pipe intake port, and discharge the SF6 gas in the SF6 cylinder into the pipeline connecting the SF6 pipe exhaust port and the valve group under negative pressure. The drying process of the heating module runs through the entire filling process. Then open the solenoid valve of the SF6 pipe exhaust port to fill the equipment with SF6 gas. The detection module detects whether the gas pressure inside the SF6 equipment reaches the standard. If it does, first close the SF6 pipe intake port, then close the SF6 pipe exhaust port, and finally turn off the air pump and heating module.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] 1. This invention achieves automatic vacuuming and gas replenishment of SF6 equipment through an air pump and valve assembly, eliminating the need for manual operation of the gas filling valve. This effectively avoids situations where the gas replenishment pressure is too high or the gas source pressure is insufficient, thus improving operational safety. At the same time, by installing a heating module at the bottom of the pipeline, it effectively reduces the amount of air and moisture entering the SF6 equipment, preventing performance degradation. The gas replenishment process is effectively monitored by the detection module and visualized on a screen, improving the control of the operation and maintenance personnel over the site.

[0019] 2. This invention provides fully automated SF6 gas replenishment without the need for manual on-site operation, greatly improving the efficiency of operation and maintenance. Through the display and control device, it achieves a high-precision, controllable, standardized, and leak-proof SF6 gas replenishment method, providing strong support for ensuring the safe and stable operation of SF6 electrical equipment in the power industry, and has high economic and social benefits. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention, the accompanying drawings required for the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Attached image labels:

[0023] 1-Housing, 2-Air pump, 3-Power supply, 4-Valve assembly, 5-Detection module, 6-Pipeline, 7-Pressure plate, 8-Pull rod. Detailed Implementation

[0024] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0025] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] Example

[0027] As attached Figure 1 As shown, this embodiment provides an automatic control device for SF6 equipment with live gas supply, including a housing, an air pump, a valve group, a power supply, a heating module, and a display and control device. The air pump, valve group, power supply, heating module, and display and control device are respectively installed inside the housing. The power supply is electrically connected to the air pump, valve group, heating module, and display and control device. The display and control device is electrically connected to the air pump, valve group, and heating module. The air pump is equipped with a vacuum intake port, a vacuum exhaust port, an SF6 pipe intake port, and an SF6 pipe exhaust port. The six exhaust ports are connected to a valve group via pipes. The valve group controls the opening and closing of the vacuum intake port, vacuum exhaust port, SF6 pipe intake port, and SF6 pipe exhaust port, respectively. The vacuum intake port and SF6 pipe exhaust port are each equipped with a detection module, which is electrically connected to a display and control device. The vacuum intake port and SF6 pipe exhaust port are connected to the air inlet of the SF6 equipment via the valve group. The SF6 pipe intake port is connected to the SF6 cylinder via the valve group. The vacuum exhaust port is connected to the outside of the casing via the valve group. A heating module is installed on the pipe connecting the SF6 pipe exhaust port and the valve group.

[0028] Specifically, the detection module includes a pressure sensor, a temperature sensor, and a flow meter. The pressure sensor, temperature sensor, and flow meter are used to detect the pressure of the vacuum level in the SF6 equipment, the gas supply temperature, and the gas supply flow rate, respectively.

[0029] Specifically, the heating module includes an electric heating element and a heat insulation cover installed outside the electric heating element. The electric heating element heats to a specified temperature after being energized, baking the corresponding pipe; the heat insulation cover is used to prevent damage to the internal components of the device due to high temperatures.

[0030] Specifically, the display and control device is located on the top surface of the housing. The display and control device includes a processor and a touch screen. The processor is electrically connected to the touch screen and the processor is a PLC controller.

[0031] Specifically, a pull rod is installed on one side, and casters are provided at the bottom.

[0032] Specifically, the power source uses a 24V lithium battery pack, which is equipped with a compatible charger. The 24V lithium battery pack is fixed inside the housing by a pressure plate. The 24V lithium battery pack can be a portable battery or it can be directly soldered in and charged via a charger.

[0033] Specifically, the valve group includes several independent solenoid valves.

[0034] On the other hand, this embodiment also provides a method for using an automatic control SF6 equipment with an electrically powered gas supply device, including the following steps: S1: Through unified control by the display and control device, start the air pump, open the solenoid valves corresponding to the vacuum intake port and vacuum exhaust port, and close the solenoid valves corresponding to the SF6 pipe intake port and SF6 pipe exhaust port; the device draws in the internal air of the SF6 equipment, and the detection module detects whether the internal air of the SF6 equipment has reached a vacuum.

[0035] S2: When a vacuum is reached, the display and control device controls the solenoid valves of the vacuum intake port and the vacuum exhaust port to close in sequence, thereby creating negative pressure in the pipeline to expel the air from each pipeline. The display and control device then controls the heating module to open and dry the moisture in the pipeline.

[0036] S3: Keep the air pump running, open the SF6 pipe intake port, and discharge the SF6 gas in the SF6 cylinder into the pipeline connecting the SF6 pipe exhaust port and the valve group under negative pressure. The drying process of the heating module runs through the entire filling process. Then open the solenoid valve of the SF6 pipe exhaust port to fill the equipment with SF6 gas. The detection module detects whether the gas pressure inside the SF6 equipment reaches the standard. If it does, first close the SF6 pipe intake port, then close the SF6 pipe exhaust port, and finally turn off the air pump and heating module.

[0037] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

Claims

1. An automatic control device for SF6 equipment with live gas supply, characterized in that: Includes housing, air pump, valve assembly, power supply, heating module, and display and control device; An air pump, a valve assembly, a power supply, a heating module, and a display and control device are respectively installed inside the housing; the power supply is electrically connected to the air pump, the valve assembly, the heating module, and the display and control device; the display and control device is electrically connected to the air pump, the valve assembly, and the heating module. The air pump is equipped with a vacuum intake port, a vacuum exhaust port, an SF6 pipe intake port, and an SF6 pipe exhaust port. These ports are connected to a valve assembly via pipes. The valve assembly controls the opening and closing of each port. Detection modules are installed at the vacuum intake port and the SF6 pipe exhaust port, and are electrically connected to a display and control device. The vacuum intake port and the SF6 pipe exhaust port are connected to the air inlet of the SF6 equipment via the valve assembly. The SF6 pipe intake port is connected to the SF6 cylinder via the valve assembly. The vacuum exhaust port is connected to the outside of the casing via the valve assembly. A heating module is installed on the pipe connecting the SF6 pipe exhaust port and the valve assembly. When the energized gas supply device of the automatic control SF6 equipment is in use, it performs the following steps: S1: The air pump is started and the solenoid valves corresponding to the vacuum intake port and vacuum exhaust port are opened and closed through the display and control device. The device draws air from the inside of the SF6 equipment and the detection module detects whether the inside of the SF6 equipment has reached a vacuum. S2: When a vacuum is reached, the display and control device controls the solenoid valves of the vacuum intake port and the vacuum exhaust port to close in sequence, thereby creating negative pressure in the pipeline to expel the air from each pipeline. The display and control device then controls the heating module to open and dry the moisture in the pipeline. S3: Keep the air pump running, open the SF6 pipe intake port, and discharge the SF6 gas in the SF6 cylinder into the pipeline connecting the SF6 pipe exhaust port and the valve group under negative pressure. The drying process of the heating module runs through the entire filling process. Then open the solenoid valve of the SF6 pipe exhaust port to fill the equipment with SF6 gas. The detection module detects whether the gas pressure inside the SF6 equipment reaches the standard. If it does, first close the SF6 pipe intake port, then close the SF6 pipe exhaust port, and finally turn off the air pump and heating module.

2. The automatic control SF6 equipment live gas supply device according to claim 1, characterized in that: The detection module includes a pressure sensor, a temperature sensor, and a flow meter.

3. The automatic control SF6 equipment live gas supply device according to claim 1, characterized in that: The heating module includes an electric heating element and a heat insulation cover installed outside the electric heating element.

4. The automatic control SF6 equipment live gas supply device according to claim 1, characterized in that: The display and control device is located on the top surface of the housing. The display and control device includes a processor and a touch screen. The processor is electrically connected to the touch screen and the processor is a PLC controller.

5. The automatic control SF6 equipment live gas supply device according to claim 1, characterized in that: A pull rod is installed on one side of the housing, and casters are provided at the bottom.

6. The automatic control SF6 equipment live gas supply device according to claim 1, characterized in that: The power source uses a 24V lithium battery pack, which is equipped with a compatible charger.

7. The automatic control SF6 equipment live gas supply device according to claim 1, characterized in that: The valve group includes several independent solenoid valves.

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